Wagon-jack.



NO MODEL.

PATENT-ED AUG. 2, 1904. L. J. GRANT.

WAGON JACK.

APPLICATION FILED APB. 25, 1904.

Mu ya? @Nonna Patented August 2, 1904.

PATENT CEEICE.

LEWIS J. GRANT, OF GRAND RAPIDS, MICHIGAN.

WAGON-JACK.

SPECIFICATION forming part of Letters Patent No. 766,690, dated August 2, 1904.

Application filed April 25, 1904.

To fdl whom it Huey concern:

Be it known that I, Lnwrs J. GRANT, a citizen of the United States, residing' at Grand Rapids, in the county of Kent and State of Michigan, have invented certain new and useful Improvements in Vagon-Jacks, of which the following' is a specification.

My invention'relatcs to improvements for raising wagon, buggy, and other vehicle axletrees and wheels for the purpose of removing' or replacing the wheel, Sac.; and its objects are, first, to provide a wagon-jack that may be immediately adjusted to any height of wagon, and, second, to provide an adjustable wagonjack that will be light and convenient to handle.

I attain these objects by the mechanism illustrated in the accompanying' drawings, in which- Figure l is a side elevation 0f a wagon-jack with the head cut away at X and Z to show the application of the clamping mechanism. Fig. 2 is a back elevation of a wagon-jack complete, and Fig. 3 is a top plan of the same.

Similar' letters referto similar parts throughout the several views.

A is a cylindrical body or standard that supports the lifting mechanism.

B is a serrated rod, preferably having a coarse screw-thread made horizontal upon its lower surface and sharply inclined upon its upper surface and made to mesh closely with corresponding teeth (.Z at the contact end of the jaws D, so that while the contact between the rod and the jaws is such that any reasonable amount of pressure upward may be exerted by the levers F upon the head C and the threads or serrations b and teeth d will sustain it to raise a great weight resting' on the top of the rod B the rod B may be readily raised to the position B by taking hold of the cap 7/ and lifting' on it or it may be readily lowered by pressing` upon the handles D and throwing the teeth d out of contact with the serrations Z), which leaves the rod free to drop by its own weight.

The jaws D are pivoted to the head C, as at Serial No. 204,888. (No model.)

(l, and are held in contact with the rod B by springs c of any desired form.

For raising' and lowering the head C, with weig'ht thereon, I pivot connecting-bars E at one end to the head C, as at c, and the other end to the end of a lever F, as at c, so that the vertical reciprocations of the lever, as indicated by the solid and dotted lines in Fig. 1, will correspondingly raise or lower the head C and with it the serrated rod B and whatever weight may be supported thereon. The lever F is pivoted to an arm Cr, as at f/, in such a manner that any effort made at the outer end of the lever will be transmitted in an opposite direction tothe head C and its several attachments.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent of the United States, isw

l. In a wagon-jack a cylindrical standard, a head mounted thereon and a lever for actuating' said head incombination with a serrated rod passing' through the head, the serrations on said rod square upon the lower surface and inclined upon the upper surface, jaws pivoted upon the head and having' teeth corresponding with the serrations on the rod, and actuating-springs, substantially as and for the purpose set forth.

2. In a wagon-jack a cylindrical standard, a vertically-reciprocating head mounted on said standard and a lever for actuating said head, in combination with connecting-bars between the lever and the head adjustable jaws pivoted upon the head and having' upwardly-inclined teeth, a rod passing through the head and into the standard and having' downwardly-inclined serrations, and actuating-springs attached to the jaws, substantially as and for the purpose set forth.

Signed at Grand RapidaMichigan, this 20th day of April, 1904.

LEIVIS J. (1l-RANT. In presence of- C. V. CILLEY, ITHIEL J. CILLEY. 

